Delta Air Lines System Timetable 1941 December 1
MLA
Delta Air Corporation. "Delta Air Lines System Timetable 1941 December 1." Delta Flight Museum. 1941-12-01, https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19411201.
APA
Delta Air Corporation (1941-12-01). Delta Air Lines System Timetable 1941 December 1. Retrieved from https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19411201
Chicago
Delta Air Corporation. "Delta Air Lines System Timetable 1941 December 1." 1941-12-01. May 2, 2026. https://dlg.galileo.usg.edu/do:delta_dal-tt_dal-tt-19411201.
